MS. MARCI K. KLAASSEN N.P.
NPI 1841398112
Nurse Practitioner - Adult Health in Aurora, CO
About Ms. Marci K. Klaassen N.p. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MS. MARCI K. KLAASSEN N.P. (NPI 1841398112) is an individual adult health provider in Aurora, Colorado, licensed in Colorado (APN.0003540-NP) and active in the NPI registry since September 2006. She is enrolled in Medicare PECOS, is affiliated with Ivinson Memorial Hospital, and is a graduate of Perelman School Of Med At The University Of Pennsylvania (2001).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 3
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Ms. Marci K. Klaassen N.p. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Marci Klaassen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Aurora, CO 80045
- Reassigned Medicare billing, Colorado enrollment
- 4,283 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Ivinson Memorial Hospital
Acute Care Hospitals · Laramie, WYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 80045 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Marci Klaassen's NPI number?
The NPI number for Marci Klaassen is 1841398112. It was assigned to this individual provider in the NPPES registry on September 20, 2006.
Where is Marci Klaassen located?
Marci Klaassen practices at 12605 E 16th Ave, Aurora, CO 80045. The listed phone number is (720) 848-0000.
What is Marci Klaassen's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Adult Health, with taxonomy code 363LA2200X.
Is Marci Klaassen enrolled in Medicare?
Yes. Marci Klaassen is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Marci Klaassen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Marci Klaassen reassigns Medicare benefits to University Physicians Incorporated (Aurora, CO). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Marci Klaassen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Marci Klaassen accept?
Health plans from Select Health and UnitedHealthcare list Marci Klaassen as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Marci Klaassen affiliated with any hospitals?
According to CMS data, Marci Klaassen is affiliated with Ivinson Memorial Hospital.
When was this NPI record last updated?
The NPPES record for Marci Klaassen was last updated on October 18, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Ms. Marci K. Klaassen, N.P. · NPI 1841398112
Adult Health physician in Aurora, Colorado. Individual provider, active in the CMS NPPES registry since September 20, 2006.
## Identity
- **NPI:** 1841398112 (Entity type: Individual)
- **Enumerated:** September 20, 2006
- **Primary specialty:** Nurse Practitioner - Adult Health · taxonomy 363LA2200X
- **State license:** APN.0003540-NP (Colorado)
- **Sole proprietor:** No
## Practice location
- **Address:** 12605 E 16TH AVE, Aurora, CO 80045-2545
- **Phone:** (720) 848-0000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** University Physicians Incorporated (NPI 1962461889, Aurora, CO), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Perelman School Of Med At The University Of Pennsylvania, class of 2001
## Record status
- **NPPES last updated:** October 18, 2018
- **Other identifiers:** Other P00247595 (CO); Other 841500572005 (CO); Other CO319108 (CO)
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Source: [NPI Profile](https://npiprofile.com/npi/1841398112) · Data from the CMS NPPES public registry.